Improvement in nail-hammers



B. F. ROBERTS.

Nail-Hammers.

N0'150357l PatentedApris2s,1874.

Fig'. 2

UNITEn STATES PATENT OFFICE B. FRANKLIN ROBERTS, OF PHILADELPHIA,PENNSYLVANIA.

IMPROVEMENT IN NAIL-HAMMERS.

Specification forming part of Letters Patent No. 150,357, dated April28, 1874; application ledv September 20, 1873.

To all whom 'it may concern:

Be it known that I, B. FRANKLIN RoBERTs, of the city and county ofPhiladelphia and the State oi' Pennsylvania, have invented a new anduseful Improvement in Socket-s for Nail- Hammers; and I do herebydeclare the following to be a clear and exact description ofthe naturethereof', suflicient to enable others skilled in the art to which myinvention appertains to fully understand, make, and use the same,reference being had to the accompanying drawings makin g part of thisspecification, in which- Figure 1 .is a side view, partly broken away,of a hammer having my invention applied thereto. Fig. 2 is a top view ofa portion thereof. Fig. 3 is a perspective view of the socket.

Similar letters of reference indicate corresponding parts in the severalgures.

This' invention relates to means for securely connecting tools to theirhandles; and it consists in a socket provided with arms and the tool,both constructed and operating as will be hereinafter more fully setforth.

Referring to the drawings, A represents a socket, with which are formed,or to which are connected, arms B B, which are arranged on oppositesides, and occupy such positions that when applied to the eye of thetool C said arms extend transversely in the eye. The socket consists ofa box .or frame, preferably of quadrilateral form, and the arms Bproject from the sides of the upper end thereof, so that there is leftin the socket and between the arms an open space lfor the reception ofthe end ofthe handle. At the point of junction of the arms and socketthere are left or formed shoulders D D, which are located at the outsideof said points, the use of which will be presently explained. The arms Bare tapering on their outer faces, either entirely or partially, fromtheir ends to the points of june tion with the socket A, and the eye ofthe tool will be correspondingly tapering 011 opposite sides, conformingto the location of the arms B.

The operation is as follows: The arms B of the socket are inserted inthe eye of the tool until the shoulders D come in contact-with the tool.The handle is then forced into the socket and driven past the samebetween the arms B until it reaches the upper orouter ends of thelatter. Vedges E are now driven into the upper end of the handle in amanner well known, whereby the said end ot" the handle is expanded andcompressed against the arms B B, and the upper ends of the latter areforced away from each other. This impart-s a dovetail form to the innerfaces ofthe arms B, and, the wedges E being driven to full extent, theportion of the handle between the arms becomes dovetailed with saidarms. The outer faces of the arms Bv likewise dovetail with the eye ofthe tool, and wedge tightly therein.

It will he seen that the eye ofthe tool is confined between the outerends' of the arms B and the shoulders D of the socket, and the lattersupport the under side of the tool, so tha-t any tendency of the tool towork loose on the handle is prevented, the shoulders acting as stopstherefor. Then the compound dovetail securely holds the handle in thesocket, and the socket in the eye ofthe tool, and thus' a firmconnection between the tool and handle is insured. i

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

The socket A, provided with arms B, in combination with the tool orhammer O, all constructed as and for the purpose herein described.

B. FRANKLIN ROBERTS.

Witnesses:

JONATHAN YERKEs, PETER CAsToR, JOHN A. WrEDERsHEIM.

